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H. J. MEDBERY. FAIL MAKING MACHINE.

110. 450,590. Patented Apr. 14,1891.

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(No Model.) 3 Sheets-Sheet 2.

H. J. MEDBERY, PML MAKING MACHINE.

N0. 450,590. Patented Apr. 14,1891.

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H. J. MEDBERY.

BAIL MAKING MACHINE. l n No. 450,590. Patented Apr. 14, 1891.

WITNESSES A y Ire-vengan @.Q'W5 I BY I ATTUHNEY Prien.

HORACE. J. MEDBERY, OF BALLSTON, NEV YORK, ASSIGNOR, BY MESNE ASSIGNMENTS, TO JONATHAN BROVNELL.

PAlL-lVlAKING MACHINE.

SPECIFICATION forming part 0f Letters Patent N 0. 450,590, dated April 14, 1891.

Application tiled August Z6, 1889. Serial No. 321,954. (No model.)

To all whom it may concern:

Be :it known that I, HORACE J. MEDBERY, a citizen of the United States, and a resident of Ballston, in the county of Saratoga and State of New York, have invented a certain new and useful Fail-Making Machine, of which the following is a specification.

Uy invention relates to an improvementin machines for the manufacture of pulp pails, so called--in other words, pails made from pulp. My invention is applicable, however, to the manufacture of various other articles having bottoms-as, for instance, pans, buckets, trays, dse-and they may be of .other shape than round, if desired, as will be apparent from the description of the machine hereinafter set forth.

The essential features of my invention are stantially to the form and shape of the bot-v tom of the pail or like vessel, whereby the vessel after it has been made in the dies may be removed therefrom without injury thereto. In the drawings the same reference letters and numerals indicate the same parts in all the figures.

Figure l illustrates a side view, partly in section, of the invention, the hydraulic cylinder and its frame being broken away. Fig. 2 illustrates a sectional view of a portion of the female die, showingits construction. Fig. 3 illustrates a vplan of the lower or female die, showing the arrangement and operation of the swinging plate, which carries the female die. Fig. 4 illustrates a vertical sectional view of a male die having perforated walls.

A is the base of the machine.

B B are upright pillars forming the frame for the sup port of the hydraulic cylinder, the. They rest on the base A.

O is a hydraulic cylinder, which may be supported on brackets (not shown) attached to the frame B or in any other suitable way. It has the usual water inlets and outlets. (Not shown.)

E is the male die. It is attached tothe lower end of the piston-rod F of the hydraulic press, which works through a stuffing-box in the bed of the cylinder, as usual. Its exterior conforms exactly to the desired size and shape of the interior of the pail or other vessel. At its lower end a transverse section thereof marked G is sepa-rate from the upper part, and from the center of this separate section a spindle H extends upwardly through a stuifing box or packing' l, and on the end of the spindle is a piston J, having packing at its side, as usual in such structures. The piston plays through a chamber or cylinder made in the interior of the die E. The piston has lugs M on its under surface, which, when the piston is depressed, come in contact with the bottom or end of the chamber, and thus limit the downward movement of the piston, so that there is always a space N below it, which corresponds -to another space O- above the piston.

P is a hole which is drilled through the solid part of the die Eand connects with the chamber N, and Q is another hole which is also drilled through the solid part of the die and connects with the chamber O.

R and S are two pipes, which are either flexible or jointed to allow vertical movement of the die E, `and at their ends they connect with the holes P and Q and at their other ends with two of the ports of a fourway cock T.

U is a water-supply pipe, and V is a wastepipe connecting with any suitable outlet.

The cock is provided with two water-ways XV and X, so cut in the plug of the cock that they open at its periphery at the quarterpoints, as shown, which coincide with the ports in the barrel of the cock.

a is the female die. It consists ofa hollow block the interior whereof is exactly the size and shape of the desired vessel. It is preferably, but not necessarily, of cast metal and very strong, and has an annular hollow chamber b in its walls, wherein are located one or more coils of steam-pipe c, whereby the die may be kept suitably heated.

c is the inlet, and c2 the escape. 'lhe inletpipe should be flexible to allow of a swinging movement by the d ie,as hereinafter explained.

(l d, the., are small holes bored through the inner shell of the female die, and e is a plate of metal, preferably steel, in which are bored numerousl very small holes ff. arral'iged in sets, which coincide in location with the larger ones d d in the metal of thefemale die.

Iemploy the superposed steel plate because the holes which are bored through the body of the die must necessarily be of considerable size. because of the required dimensions of the drill necessary to stand the strain, and their diameter would in mostinstances be such that the pulp would be squeezed through them, whereas the sets ot' holes in the relatively thin steel plate may be made quite small, the temper of the plate being reduced or entirely drawn, it' need be, to allow ot' the drilling or puncturing of these sets of small holes, and then retempered.

g is a draw-offvppe for the surplus tibersaturating compound, which is pressed out from the pulp and passes through the said holes into the chamber l), as hereinafter explained.

d is a shoulder at the upper part of the interior periphery of the female die, which eoincides exactly with a similar shoulder a2 on the male die, and the exterior surface ab' of the male die slides snugly `against the surface of* of the female die during the downward compressing movement of the male die.

h is an annular packing-ring, o`t` metal, ru bber, or equivalent material. set in a recess in the bottom of the female die, and t' is a plate or disk the edges whereof rest ou the packing-ring.

jis a stem attached to the center of the disk t', which enters a hole il', bored through the solid bottom of the die and through the plate. The stem] extends almost through the hole in the plate, but not quite. There are two female dies, each the counterpart of the l other. They are set upon astrong plate near the ends thereof. This plate is pivoted at its central part upon one of the pillars B of the frame, or at such other convenient place as may be preferred, and in such manner that the plate may be reciprocated upon its pivot without interfering with any other part of the apparatus, so that while one of the female dies is under the male die undergoing the pail-forming operation the attendant may p be removing the pail last made from the other l die and putting into it the new charge of pulp for the next pail. The plate of course slides into Very close contact with the bed of the machine under the press, as shown, so that it is fully supported thereby during the pressing operation.

m is a shaft, upon which is keyed a cam a, which at each revolution presses a pin o upwardly, which pin plays through a hole o',

` male die drilled in the base of the press, and which engages with the hole through the platet when the plate is fully swung under the press. Thus at each revolution of the shaft in the pin o, operating on the end of the stem j,lil`ts the disk L' slightly from the interior bottom of the female die. Thus the pail is forced upwardly and loosened from the female die, yet remains in it and moves outwardly from the press with the female die, when the plate lis swung, as before stated.

The operation is as follows: The pulp is tirst made into a stiff but plastic mass bv intimate admixture with the waterproofing and adhesive materials in any preferred manner. These materials may be such as are now used for such purposes and do not require description here. I prefer a specially-prepared compound invented by myself; but since the operation ot' the machine will be substantially the same, whether my preferred compound or various other known compounds are used, it is not necessary to describe my special mixture here. A suitable quantity ot' the pulp so treated is placed in the female die. The die is then swung underthe male die, the wateris then allowedtoenterthehydraulic cylinder C,as usual, and the male die is brought down upon the pulp in the female cylinder. The position ot' the plate G on the lowerend of the male die during its descent is close up against the bottom of that die. The descent of the male die under the enormous pressure which Iemploy (usually about tive hundred tous) forces the pulp to rise about the sides of the maledie and lill all the space between the twodies, and if the pulp should not rise evenly on all sides, lout. at some places more than at others, then the vertical part CL4 of the shoulder a' will confine it, and the descending male die will sweep all of such material back again below the shoulder a' and willdistribnte it by the great pressure throughout the entire space between the two dies7 thus securing uniform density in the finished article. During the compressing operation any excess of the saturating compound will be forced out from the pulp through the holes in the inner steel lining of the female die, and thence through the holes in the body of the die into the space b within the walls of the IOC IIO

die, and it will How out ofthe escape-pipe g.

The temperature of the die is maintained at such a degree by the steam-pipes that this saturating material will be kept fluid. If not necessary for that purpose, the pipes need not be used. After the pressing operation has been performed the stop-cock T is turned in such manner that hydraulic pressure will be applied within the chamber() sufcient to hold the plate G down firmly against the bottom of the pail, and thus causing separation between the male die and the pail when the rises. The water-pressure in the main cylinder C is then reversed to the under side of the piston, and the male die rises, pulling out of the pail, which is held down by the plate-G, as before explained, and when the pistou J has passed through the chamber in the male die a certain distance sufficiently to free the pail from the male die then the lugs M come in contact with the bottom of the chamber, and from that time on the plate G is carried upwardly with the male die. As soon as the plate G has left the bottom of the pail and the vmale die is partially out from the pail the cam n on the shaftm lifts the pin 0,

which, engaging with the lower end of the` stem jon the disk t', forces it up. Thus the pail is in turn separated from the female die. As soon as the cam has revolved sufficiently to allor the pin 0 to descend below the plate Z then the plate will be swung on its axis and the other newly-charged female die will move under the press and a second operation be performed the same as before; but before the male die again descends the water-pressure in the chamber in the male die is shifted from above the piston .I to below it by a qua-rter-turn of the plug of the cock T, whereby the inflow is carried through the pipe R to the chamber N below the piston, and the wa- .ter above the piston in the chamber 0 is allowed to escape through the pipe S to the waste-pipe i. This forces the plate Gsnugly up again against the bottom of the male die, ready for another compressing operation. It will be seen that the water below the piston escapes in an equivalent manner to the waste when the pressure is again applied above the piston.

Iintend in practice to connect all the moving parts together in such manner that the action of the cock T and the cam n and the descent of the male die and the swinging of the plate l shall all be automatic and all accurately timed relative to each other. This mechanism I do not describe herein, because I propose that it shall form the subject of another application for Letters Patent.

In Fig. 4 I show a construction of the male die in which its walls are perforated substantially the same as those of the female die. It is sometimes preferable to have both of the dies perforated and sometimes the female only and sometimes the maleonly. In this construction of the male die the parts already enumerated are given the same reference-letters as in the other figures, and in addition to said features there are present the following elements: lis an annular chamber made in the die, it being surrounded on all sides with solid metal, as shown. 2 is a steam-pipe, which enters the chamber and after making certain convolutions therein, as desired, goes ed in an escape or exhaust pipe 3, which discharges at the upper side of the die. 44, the., are holes bored through the solid exterior of the body of the die substantially the same as the holes d in the female die. .5 is a plate, preferably steel, as before stated, which has in it the small holes coincident in location with the larger ones 4 in the body of the die. G is an opening, which may be covered or not,

as preferred, made in the upper shell of the die, through which a suitable implement, preferably a suction-pump of somewhat large cylinder area, may be introduced to the bottom of the chamber l, whereby the saturating compound, which is pressed from the pulp and which passes through the holes in the walls of the die into the chamber 1, may be removed at each downward or pressing movement of the die. It will be kept fluid by the heat from the steam-pipe, the same as in the case of the female die. There should of course be a movable joint in the steam-pipe 2 to admit of the rising and falling of the die.

The operation of the mail die when perforatedis obvious from the foregoing description.

It is obvious that if there be only so much saturating material used as will be desirable to leave in the completed article there will then be no necessity for the holes in the dies, either the female or the male, nor for the inner lining of steel. It is also obvious that, if preferred, the lining of steel or other material may be omitted, other suitable means being employed to prevent the escape of the pulp; or the holes in the body of the dies may, with sufficient care, and also by means other than drilling, be made small enough, in which event there will be no need for the lining.

Having described my invention, I claim l. The combination, in a machine for molding pulp, of a male and female die, the lnale die having at its lower end a movable plate and means for holding the plate against the die and imparting positive movements to the plate toward and away from the die, and means whereby the dies may be closed upon each other, substantially as set forth.

2. The combination, in a machine for molding pulp, of a male and a female die, the female die having holes in its walls and the male die having a movable plate at its lower end, and means for holding the plate against the die and imparting positive movement to the plate toward and away from the male die, and means whereby the dies may be closed upon each other, substantially as set forth.

3. The combination, in a pulp-molding machine, of a male and female die, the male die having a shoulder which engages with a shoulder on the female die, whereby the material being compressed between the dies is crowded into place, substantially as set forth.

Il. The combination, in a machine for molding pulp, of a male die having a movable plate at its lower end and means for holding the plate against the die and imparting positive movements to the plate toward and away from the die, and a female die having a movable disk or plate at its bottom and perforations in its walls and means to move the disk or plate in the female die, and means to bring the dies together, substantially as set forth.

5. The described improvement in the male dies of pulp-molding machines, consisting in a movable section of the die at its forward IOO IIO

ond adapted to move toward and from the i die, and means in the interior of the die i whereby the section may be so moved, suhstantially as set forth.

6. The described improvement in the male dies of pulp-molding machines, consisting in a movable section at the forward end of the die, a spindle or stem projecting therefrom into a piston-chamber, a piston on the end of i the stem, and means whereby Water-pressure may be applied at the under and the upper sides of the piston, substantially as set forth.

'7. The combination, in a pulp-molding mai chine, of a pivoted plate having a plurality ot' female molding-dies fastened thereon, amovable plate in the bottom of each die, a stem f projecting` from each plate partially through a hole made in the bottom of the die and through the plate, and a pin adapted to move through a hole in the bed of the machine and engage with the stem of the plates in the dies, respectively, when in position under the press, and means to operate the said pin, substantially as set forth.

digned at Meehaniosville, in the County of Saratoga and State of New York, this 17th day of August, A. D. 1889.

l-IORACE J. MEDBERY. 

